Such features result from the several steps of bone growth intended to reunify mechanically or pathologically separated pieces of bone.
Importantly, the new osteoid material observed in the ZOL treated mice appears largely un-calcified (Figure 6C and 6D), particularly at the high dose (Figure 6D), at the time when the mice were killed suggesting an uncoupling of the osteoid development and calcification steps of bone formation.
Some chemokines can stimulate one or more steps of bone resorption, including the recruitment, differentiation, or fusion of precursor cells to form osteoclasts or enhance osteoclast survival [ 104].
In multivariable analyses, we found that besides markers of bone resorption, which are specific to bone, only VEGF was independently associated with bone metastases, probably because it mediates biological processes involved at multiple steps of bone metastasis formation.
The obtained results might also have some value for the bone banks where the level of expression of BMPs could change after single steps of bone preservation as freezing, liophilisation, radiation sterilization etc.
To provide some context in which to appreciate the function of miRNAs in the skeleton, we will briefly consider the steps of bone remodeling and the signals important for osteoclast and osteoblast maturation.
Further, elevated levels of DKK1 may negatively influence several important steps of bone metastasis, such as mobilisation, engraftment, and proliferation of prostate cancer stem cells to and within the bone marrow (Tian et al, 2003; Adams and Scadden, 2006; Lee et al, 2011).
However, the mechanical properties of the bone have to be restored during the last step of successful bone healing, namely the remodeling phase.
As β3 integrin is involved in the cytoskeletal organization step of the bone resorption process, this may explain the defect in ruffled border membrane formation.
